Board Thread:Pokémon Help/@comment-32153193-20180106035705/@comment-31398341-20180106152114

Ice Punch is not out yet, but nonetheless it can learn Rock Tomb and damages Mega Salamence reasonably (boosted by Technician)

Make sure which Mega you actually want to use, and what's the idea behind that Metagross EV investment? 252 Atk 252 Speed is almost always the best option unless you have a specific benchmark for something.